Microchip Technology DM183037 Data Sheet
PIC18F97J94 FAMILY
DS30575A-page 576
2012 Microchip Technology Inc.
TABLE 29-1:
OPCODE FIELD DESCRIPTIONS
Field
Description
a
RAM access bit:
a = 0: RAM location in Access RAM (BSR register is ignored)
a = 1: RAM bank is specified by BSR register
a = 0: RAM location in Access RAM (BSR register is ignored)
a = 1: RAM bank is specified by BSR register
bbb
Bit address within an 8-bit file register (0 to 7).
BSR
Bank Select Register. Used to select the current RAM bank.
C, DC, Z, OV, N
ALU Status bits: Carry, Digit Carry, Zero, Overflow, Negative.
d
Destination select bit:
d = 0: store result in WREG
d = 1: store result in file register f
d = 0: store result in WREG
d = 1: store result in file register f
dest
Destination: either the WREG register or the specified register file location.
f
8-bit register file address (00h to FFh), or 2-bit FSR designator (0h to 3h).
f
s
12-bit register file address (000h to FFFh). This is the source address.
f
d
12-bit register file address (000h to FFFh). This is the destination address.
GIE
Global Interrupt Enable bit.
k
Literal field, constant data or label (may be either an 8-bit, 12-bit or a 20-bit value).
label
Label name.
mm
The mode of the TBLPTR register for the table read and table write instructions.
Only used with table read and table write instructions:
Only used with table read and table write instructions:
*
No Change to register (such as TBLPTR with table reads and writes)
*+
Post-Increment register (such as TBLPTR with table reads and writes)
*-
Post-Decrement register (such as TBLPTR with table reads and writes)
+*
Pre-Increment register (such as TBLPTR with table reads and writes)
n
The relative address (2’s complement number) for relative branch instructions or the direct address for
Call/Branch and Return instructions.
Call/Branch and Return instructions.
PC
Program Counter.
PCL
Program Counter Low Byte.
PCH
Program Counter High Byte.
PCLATH
Program Counter High Byte Latch.
PCLATU
Program Counter Upper Byte Latch.
PD
Power-Down bit.
PRODH
Product of Multiply High Byte.
PRODL
Product of Multiply Low Byte.
s
Fast Call/Return mode select bit:
s = 0: do not update into/from shadow registers
s = 1: certain registers loaded into/from shadow registers (Fast mode)
s = 0: do not update into/from shadow registers
s = 1: certain registers loaded into/from shadow registers (Fast mode)
TBLPTR
21-bit Table Pointer (points to a Program Memory location).
TABLAT
8-bit Table Latch.
TO
Time-out bit.
TOS
Top-of-Stack.
u
Unused or Unchanged.
WDT
Watchdog Timer.
WREG
Working register (accumulator).
x
Don’t care (‘0’ or ‘1’). The assembler will generate code with x = 0. It is the recommended form of use for
compatibility with all Microchip software tools.
compatibility with all Microchip software tools.
z
s
7-bit offset value for Indirect Addressing of register files (source).
z
d
7-bit offset value for Indirect Addressing of register files (destination).
{ }
Optional argument.
[text]
Indicates an Indexed Address.
(text)
The contents of text.
[expr]<n>
Specifies bit n of the register indicated by the pointer expr.
Assigned to.
< >
Register bit field.
In the set of.
italics
User-defined term (font is Courier New).